Flat band carrier confinement in magic-angle twisted bilayer graphene

dc.contributor.author Tilak, Nikhil
dc.contributor.author Lai, Xinyuan
dc.contributor.author Wu, Shuang
dc.contributor.author Canfield, Paul
dc.contributor.author Zhang, Zhenyuan
dc.contributor.author Xu, Mingyu
dc.contributor.author de Almeida Ribeiro, Raquel
dc.contributor.author Canfield, Paul
dc.contributor.author Andrei, Eva
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy
dc.date 2021-07-30T19:57:03.000
dc.date.accessioned 2021-08-14T01:37:46Z
dc.date.available 2021-08-14T01:37:46Z
dc.date.issued 2021-07-07
dc.description.abstract <p>Magic-angle twisted bilayer graphene has emerged as a powerful platform for studying strongly correlated electron physics, owing to its almost dispersionless low-energy bands and the ability to tune the band filling by electrostatic gating. Techniques to control the twist angle between graphene layers have led to rapid experimental progress but improving sample quality is essential for separating the delicate correlated electron physics from disorder effects. Owing to the 2D nature of the system and the relatively low carrier density, the samples are highly susceptible to small doping inhomogeneity which can drastically modify the local potential landscape. This potential disorder is distinct from the twist angle variation which has been studied elsewhere. Here, by using low temperature scanning tunneling spectroscopy and planar tunneling junction measurements, we demonstrate that flat bands in twisted bilayer graphene can amplify small doping inhomogeneity that surprisingly leads to carrier confinement, which in graphene could previously only be realized in the presence of a strong magnetic field.</p>
dc.identifier archive/lib.dr.iastate.edu/ameslab_manuscripts/957/
dc.identifier.articleid 1960
dc.identifier.contextkey 24098183
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/957
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/7wbOPmWv
dc.language.iso en
dc.relation.ispartofseries IS-J 10550
dc.source.bitstream archive/lib.dr.iastate.edu/ameslab_manuscripts/957/IS_J_10550.pdf|||Sat Jan 15 02:34:45 UTC 2022
dc.source.uri 10.1038/s41467-021-24480-3
dc.subject.disciplines Physics
dc.subject.keywords Electronic properties and materials
dc.subject.keywords Two-dimensional materials
dc.title Flat band carrier confinement in magic-angle twisted bilayer graphene
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication c5a8128b-7d98-4b8f-92d7-b1385e345713
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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